Embedded Files
Chapter 7: Section Outline
Chapter 7: Section Outline
7.1 Angles of Polygons
7.2 Properties of Parallelograms
7.3 Proving That a Quadrilateral is a Parallelogram
7.4 Properties of Special Parallelograms
7.5 Properties of Trapezoids and Kites
Section Objectives
Section Objectives
7.1 – Angles of Polygons
Students will find interior and exterior angle measures of polygons using angle sum theorems and apply these relationships to solve problems (G.4A).
7.2 – Properties of Parallelograms
Students will identify and apply the properties of parallelograms—including opposite sides, angles, and diagonals—to solve problems and justify reasoning (G.7A, G.7B).
7.3 – Proving That a Quadrilateral is a Parallelogram
Students will use coordinate geometry and congruence relationships to prove a quadrilateral is a parallelogram (G.2C, G.7A, G.7B).
7.4 – Properties of Special Parallelograms
Students will identify and apply properties of rhombuses, rectangles, and squares and use them to solve problems and justify geometric relationships (G.7A, G.7B).
7.5 – Properties of Trapezoids and Kites
Students will explore and apply the properties of trapezoids (including isosceles trapezoids) and kites to find angle and side measures and prove relationships (G.7A, G.7B).
Need a fresh copy of your notes? Click the buttons to download a PDF for each section.
Need a fresh copy of your notes? Click the buttons to download a PDF for each section.
These are the same guided notes we use in class—perfect for staying organized or catching up after an absence.
Independent Practice
Independent Practice
Practice assignments will appear here after we complete each lesson.
Practice assignments will appear here after we complete each lesson.
They may be worksheets or textbook problems, depending on the topic. Check back regularly to stay on track—no early access to homework!
💡 Remember: Always attempt the work on your own before checking the answers. These keys are here to support your learning—not replace it!
Textbook Library
Textbook Library
Access the textbook pages we’re using in class by clicking the buttons.
Access the textbook pages we’re using in class by clicking the buttons.
These pages match your Big Ideas Math textbook and are great for reviewing examples, completing assignments, or getting extra practice at home.
Video Resources
Video Resources
Watch the videos linked below for step-by-step examples, topic reviews, and helpful tips.
These videos align with what we’re learning in class and are great for getting ahead, extra support, review, or catching up if you’ve been absent.
HG+7.1+Angles+of+Polygons.mp47.1
HG+7.2-7.3+Properties+of+Parallelograms.mp47.2 / 7.3
HG+7.4+Special+Parallelograms.mp47.4
7.5
Note Answer Keys
Note Answer Keys
Missed something in class or were absent? Answer keys will be posted here at the end of the day we complete a lesson.
Missed something in class or were absent? Answer keys will be posted here at the end of the day we complete a lesson.
Use them to review, fill in anything you missed, and make sure your notes are complete and accurate.
Click on the section titles to jump to the notes you need. You can scroll through without opening a new window. Slides also include a home button to return to the main page for easy navigation.
Extra Materials & Resources
Extra Materials & Resources
Looking for more ways to practice or dive deeper? This section includes optional review sheets, challenge problems, formula reference pages, and other helpful tools to support your success in Algebra 1. Use these resources to strengthen your understanding or get ahead!
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